Chevy Silverado 2003 v6 vortex 4.3

Asked by Marcus7878 May 01, 2016 at 06:46 PM about the 2003 Chevrolet Silverado 1500 LS LB RWD

Question type: Maintenance & Repair

My truck stalled out on the highway at 65
mph about twenty min , ? Done it several
times did spark plugs and wires ,cleaned
throttle body , changed I a c unit for air
flow , and fuel filter , thought it ran better
still stalled out no codes ?

1 Answer
4,960

Mikbek answered 8 years ago

I had the same kinda problem and everyone gave me all kind of good suggestions, but bottom line u need to try to isolate problem when it actually exists or u will just be guessing. Right when it happens is it no spark or no fuel. So far I THINK mine was a faulty relay to pump. So far so good. I did read in and around those years ( mine is 96) wiring plug to pump was shorting out. Try not to just guess. Wish u well my friend let us know what happens, maybe I'll need it...lol!

Mark helpful

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